Nguyễn Vũ Hải Thắng's Profile

Yes, they are or No, they aren't

số mol của 32g Cu: 2 mol số mol của 80g CuO: 1 mol số mol của 4,48l CO2: 0,2 mol

a)ⁿhh=19.2.10²³/6,02.10²³≈6.3mol⇒^Vhh=6,3.22,4=141,12l

b)^mhh=^mO₂+^mCO₂+^mSO₂=32.1,5+44.0,5+64.(6,3-1,5-0,5)=345,2g

đung như ở trên.

who

1)didn't - didn't feel.

2) has gone - did - go.

I'll talk to her again.

He is gonna meet you.

They'd to study on tomorrow. 

→He is always interupt me whenever I speak.

Students are often made to do a lot of homework.

Chuyển sang câu bị động

1. He shouldn't do that sillu thing. 

=>That silly thing shouldn't be done. 

2. My sister gave me a new pair of jeans on my fifteen birthday. 

=>I was given a new pair of jeans by my sister on my fifteen birthday.

3. The workers are building a super market on your street.

=>A supermarket is being built on your street by the workers. 

4. The zoo keepers feed the animals twice a day. 

=>The animals are fed by the zoo keepers twice a day. 

5. They have sold their car to pay their debt. 

=>Their car has been sold to pay their debt. 

6. We are going to grow flowers in the front of garden.

=>Flowers are going to be grown in the front of garden. 

7. You mustn't use this machine after 5.30 pm. 

=>This machine mustn't be used after 5.30 pm. 

8. My grandmother's knitting a new sweater for me. 

=>A new sweater is being knitted for me by my grandmother.

9. Passengers shouldn't throw their tickets. 

=>Their tickets shouldn't thrown by passengers. 

10. Candidates may not use dictionakies. 

=>Dictionaries may not be used by candidates. 

11. A machine could do this much more easily. 

=>This could be done much more easily by a machine.

12. They ought to look him up. 

=>He ought to be looked up. 

13. People ought to introduce him to the village. 

=>He ought to be introduced to the village. 

14. You can see him off the airport.

=>He can be seen off the airport. 

15. No one could do anything to put the fire off. 

=>Anything to put the fire off couldn't be done.

16. He is going to present the athletes to the spectators. 

=>The athletes is going to be presented to the spectators by him. 

17. We wont't keep those books for reference. 

=>Those books for reference won't be kept. 

18. Presidents were signing those papers at 8 o' clock yesterday.

=>Those papers were being signed by presidents at 8o'clock yesterday.

19. Waiters and waitreses were seeving customers. 

=>Customers were being seen by waiters and waitreses. 

20. Was Mary helping her mother at the time ? 

=>Was Mary's mother being helped by her at the time?

21. Alex was preparing that report when I came to see him.

=>That report was being prepared by Alex when I came to see him.

22. A police took him to the police station.

=>He was taken to the police station by a police.

23. Her husband didn't love her.

=>She wasn't loved by her husband.